linux-kernel - [PATCH v2 1/2] linux/kernel.h: use 'short' to define USHRT_MAX, SHRT_MAX, SHRT

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Message-Id: <1549156242-20806-1-git-send-email-yamada.masahiro@socionext.com>
Date:   Sun,  3 Feb 2019 10:10:41 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Zhang Yanmin <yanmin.zhang@...el.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/2] linux/kernel.h: use 'short' to define USHRT_MAX, SHRT_MAX, SHRT_MIN

The commit log of 44f564a4bf6a ("ipc: add definitions of USHORT_MAX
and others") did not explain why it used (s16) and (u16) instead of
(short) and (unsigned short).

Let's use (short) and (unsigned short), which is more sensible, and
more consistent with the other MAX/MIN defines.

As you see in include/uapi/asm-generic/int-ll64.h, s16/u16 are
typedef'ed as signed/unsigned short. So, this commit does not have
a functional change.

Remove the unneeded parentheses around ~0U while we are here.

Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc: Alexey Dobriyan <adobriyan@...il.com>
Cc: Zhang Yanmin <yanmin.zhang@...el.com>
---

Changes in v2:
  - Remove unneeded parentheses

 include/linux/kernel.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 8f0e68e..afc19d9 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -16,9 +16,9 @@
 #include <asm/byteorder.h>
 #include <uapi/linux/kernel.h>
 
-#define USHRT_MAX	((u16)(~0U))
-#define SHRT_MAX	((s16)(USHRT_MAX>>1))
-#define SHRT_MIN	((s16)(-SHRT_MAX - 1))
+#define USHRT_MAX	((unsigned short)~0U)
+#define SHRT_MAX	((short)(USHRT_MAX>>1))
+#define SHRT_MIN	((short)(-SHRT_MAX - 1))
 #define INT_MAX		((int)(~0U>>1))
 #define INT_MIN		(-INT_MAX - 1)
 #define UINT_MAX	(~0U)
-- 
2.7.4